TUSCALOOSA, Alabama -- The inevitable became reality Friday when one of Alabama's top juniors signed a Major League contract to effectively end his college careers.

Hard-throwing pitcher Spencer Turnbull, who was selected by the Detroit Tigers in the second round with the 63rd pick, will receive a $900,600 signing bonus, according to MLB.com's Jim Callis. He'll begin his career at the Tigers' single-A affiliate in Norwich, Connecticut.

Outfielder Ben Moore, an eighth-round selection by the Boston Red Sox, has yet to sign his deal but is expected to.

Lefthander Justin Kamplain, an 18th-round selection by the New York Yankees, has yet to sign a deal. If Kamplain signs, Alabama will be without all three of its regular weekend starters in 2015, as left-hander Jon Kellerrecently underwent elbow surgery.

Turnbull, who is Alabama's highest-selected player since 2006, went 5-7 and boasted a 2.22 earned run average in 2013. He struggled with his control but consistently threw in the 92-94 miles-per-hour range.